https://devzone.nordicsemi.com/f/nordic-q-a/76594/spim3-on-nrf52840-and-sdk17-0-2Hello. I&#39;ve got problem with properly build example SPIM3 code. I took blinky example, added code from nrfx_spim example, set SPIM3 in sdk_config.h, add nrfx_spim to project and ...... nrfx_spim_init(...) is undefined symbol. I have no idea why. Myen-USTelligent Community 13Tue, 22 Jun 2021 12:30:56 GMThttps://devzone.nordicsemi.com/thread/316471?ContentTypeID=1Tue, 22 Jun 2021 12:30:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f1aeae50-f3f6-4e7f-913c-a6bb8c8fd6c0Karl Ylvisaker<p>Hello PW,</p> [quote user="PW"]It&#39;s was solved.[/quote] <p>I am happy to hear that you were able to resolve your issue!</p> [quote user="PW"]SPI_ENABLED section in sdk_config.h has to be commented. SPI_ENABLED 0 is not enough.[/quote] <p>This is correct, because apply_old_config will overwrite any NRFX_*_ENABLED if a *_ENABLED is left <em>defined, </em>therefore it needs to be commented out or removed completely.<br />This feature is in place to ensure backwards compatibility, but I have seen that this has caused confusion for multiple forum goers, and I have reported this for review internally.<br />You can read more about <a href="https://devzone.nordicsemi.com/f/nordic-q-a/60127/compare-sdk_config-files">this issue here</a>. Sorry for the inconvenience!<br /><br />Please do not hesitate to open a new ticket if you encounter any issues or questions in the future!<br /><br />Best regards,<br />Karl</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/316450?ContentTypeID=1Tue, 22 Jun 2021 11:24:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:616a194d-3cd1-4500-8a05-ded06e91a44bPW<p>It&#39;s was solved. SPI_ENABLED section in sdk_config.h has to be commented. SPI_ENABLED 0 is not enough.&nbsp;<span class="emoticon" data-url="https://devzone.nordicsemi.com/cfs-file/__key/system/emoji/1f914.svg" title="Thinking">&#x1f914;</span>&nbsp;After that, code inside nrfx_spim.c is active in project. Strange...</p><div style="clear:both;"></div>